fix schedule viewing for text like
1756: HeapConstant[0x3ff62d29 <FixedArray[31]>] : HeapConstant(0x3ff62d29 <FixedArray[31]>)

BUG=

Review-Url: https://codereview.chromium.org/2471573007
Cr-Commit-Position: refs/heads/master@{#40786}